Global Deterioration Scale for assessment of Primary Degenerative Dementia
Level 1 - Clinical characteristics: No cognitive decline or memory
deficits.
Level 2 - Clinical characteristics: "Forgetfulness Stage" Very mild
cognitive
decline. Subjective complaints of memory deficits such as losing familiar
objects, forgetting names of persons formerly known well,. Some word
finding
noted. No obvious objective evidence on clinical interview or in
social/employment situations. Appropriate concern regarding symptoms.
Level 3 - "Early Confusional Stage" Mild cognitive decline. Multiple
deficits
noted: getting lost while traveling to unfamiliar location; decreased
performance in demanding work settings; word and name finding deficits
become noticeable; poor retention of reading materials; forgets names
of new
acquaintances, loses valued items and has a concentration deficit.
Denial with
mild to moderate anxiety accompanies symptoms.
Level 4 - "Late Confusional Stage" Moderate cognitive decline. Clear-cut
deficits in following areas: decreased recall of current and recent
events; some
memory deficits in personal history; decreased ability to handle
finances,
travel and complex tasks. Is still oriented to time and person,
recognizes
familiar persons and faces, can travel to familiar places. Denial is
dominant
defense mechanism. Flattening of affect and withdrawal from challenging
situations.
Level 5 - "Early Dementia Stage" Moderately severe cognitive decline.
Patient requires some assistance to function, cannot recall major
relevant
aspects of their lives (home address, where they went to school or
names of
family members such as grandchildren), may be disoriented to time and
place;
can usually remember their own name, their spouse and their children.
Unable
to count backwards from 40 by 4's or 20 by 2's. Can toilet, feed and
dress self
but requires assistance with choosing proper clothes to wear due to
judgment
impairment.
Level 6 - "Middle Dementia Stage" Severe cognitive decline. May forget
name of spouse upon whom they are now quite dependent. Largely unaware of
all recent events and experience but retain sketchy knowledge of their
past
life. Requires assistance with activities of daily living and
eventually develops
urinary and fecal incontinence. They know their own name and
frequently are
able to distinguish familiar from unfamiliar persons. Personality and
emotional
changes occur and could include delusional behavior, obsessive behaviors,
anxiety symptoms, agitation and previously absent aggression. Cognitive
abulia and loss of will may occur due to inability to carry a thought
long enough
to decide a course of action or to recognize cause and effect.
Level 7 - "Late Dementia and Failure to Thrive Stage" Very severe
cognitive
decline. All verbal abilities are lost. Incontinent, requires maximum
assistance
toileting and feeding. Loss of basic psychomotor skills beginning with
ambulation, sitting and head control. Generalized and cortical
neurologic signs
are frequently present but patient is unable to attend to or follow
commands.
Adapted from Reisberg, B., Ferris, S.H., Leon, J.J. and Crook, t. .The
Global Deterioration Scale for the Assessment of Primary Degenerative Dementia by the American Journal of
Psychiatry, 1982, 139:1136-1139.